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Fragilaria irregularis sp. nov. a new araphid species (Fragilariaceae, Bacillariophyta) from the River Adegoy, Krasnodar Territory, Russia
Chudaev, D.; Jüttner, I.; Van de Vijver, B. (2021). Fragilaria irregularis sp. nov. a new araphid species (Fragilariaceae, Bacillariophyta) from the River Adegoy, Krasnodar Territory, Russia. Phytotaxa 508(2). https://dx.doi.org/10.11646/phytotaxa.508.2.11
In: Phytotaxa. Magnolia Press: Auckland. ISSN 1179-3155; e-ISSN 1179-3163
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| Trefwoorden |
Algae
Bacillariophyceae [WoRMS]; Fragilaria H.C. Lyngbye, 1819 [WoRMS]
Zoet water |
| Author keywords |
Caucasus; diatoms; Fragilaria; morphology; new species; Russia; taxonomy; Algae |
| Auteurs | | Top |
- Chudaev, D.
- Jüttner, I.
- Van de Vijver, B.
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| Abstract |
During a survey of the diatom flora of the Adegoy River (Krasnodar Territory, Russia), an unknown Fragilaria species (Bacillariophyta) was found that could not be identified using the currently available literature and here we describe it as a new species. The morphology of Fragilaria irregularis sp. nov. was studied using light and scanning electron microscopy and compared to similar species including Fragilaria deformis, F. rinoi, F. septentrionalis and Fragilariforma bicapitata. It differed from these taxa in several characters. Most observed valves showed an irregular striation pattern, a feature not observed in other species. Other important differences include valve outline (linear with parallel margins) and stria density (7–14 in 10 µm, lower compared to all other species). The new taxon has a linear valve outline with parallel to weakly convex margins, subcapitate apices and a very irregular, coarse striation pattern. |
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